Biodiversity and Sequence of the Middle Triassic Panxian marine Reptile Fauna, Guizhou Province, China

The Middle Triassic Panxian Fauna is a physical marker and representative record of the rapid recovery of the Triassic marine ecosystem following the Early Triassic stagnant stage after the end-Permian mass extinction. Ten marine reptile taxa have been found from the 1.82-2.10 m.thick fossiliferous level in the Upepr member of the Guanling Formation, which can be subdivided into three marine reptile beds trhough the analysis on the stratigraphical distribution of fossil reptiles